InsomniaTirednessIrritabilityNervousnessnot gaining much weight even though I eat unhealthily oftenHeat sensitivity - if I am in a small shop with lots of people, I start to feel hot and dizzyIncreased perspirationWarm skinItchy skin not too sure if it's anything to do with it, but I have a scratch now and then, but I think that one is normalGreasy hair - a lot of dandruffMuscular weakness did have this but have been working out to put it rightEye changes I think this is related to staring at the tv too long (blackouts)Rapid heart beat only noticed it while racing my friend for 30 mins on gym bikes - i had about double his heartbeat (but he does ride a lot)Shaky hands - not much but I have noticed it now and thenTiredness

I just wanted to know what would be the best thing to do next, obviously it's gonna be based somewhat on what my doctor says, but I just wanted an idea.

I also wanted to know when the best time to get the treatment would be, because as much as I want rid of it, I don't really want it to be noticeable for everybody else (e.g. do it over the holidays).

Almost every symptom you've listed would be consistent with hyperthyroidism. Your doctor will determine how best to proceed, but most often the thyroid is simply killed off with radiation, which leaves nothing for anyone to notice. You simply have to be followed for a while and take thyroid replacement therapy (as a rule) to compensate for the lack of natural thyroxine. Once the levels have been stabilized you'll just have (again, most likely) to take the medication once a day and be checked every six months or so to be sure your levels are correct. Otherwise there's really not to much to worry about as a rule. You'll likely notice a lot of changes, mostly improvements, as many of your symptoms disappear (a very few you mentioned could possibly be unrelated, but most fit the profile). I don't think this should be too complicated, so I hope this helps answer your question. If not, by all means feel free to follow up with us here. Keep us updated, also, on how this all goes. Good luck to you!